Automatic cover-turning vacuum packaging machine capable of preventing vacuum bag from being punctured and protecting product

Abstract

The invention relates to the technical field of vacuum packaging machines, and discloses an automatic cover-turning vacuum packaging machine capable of preventing a vacuum bag from being punctured and protecting a product, the automatic cover-turning vacuum packaging machine comprises a table body, and the outer side of the table body is rotationally connected with a cover shell located above the table body. The automatic flip vacuum packaging machine capable of preventing the vacuum bag from being punctured and protecting the product has the advantages of being good in sealing performance, capable of preventing the sealing bag from being punctured and the like, and solves the problems that according to an existing automatic flip vacuum packaging machine, a vacuum pump is often directly connected with a cover shell, the cover shell is directly vacuumized, then pressure is instantly released through a pressure release valve, but the pressure release speed cannot be effectively controlled, and the production efficiency is high. When meat with bones or other products with hard objects are encountered, the compression rate of the sealing bag cannot be adjusted, the discharging rate of air in the sealing bag is too high, when the sealing bag is squeezed and contracted quickly, the bones or other hard objects easily puncture the self-sealing bag, and air leakage is caused when the self-sealing bag is placed. And external air is sucked into the sealing bag.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum packaging machines, in particular to an automatic cover-turning vacuum packaging machine which can prevent vacuum bags from being punctured and protect products. Background Art

[0002] The vacuum packaging machine can automatically extract the air in the packaging bag and complete the sealing process after reaching a predetermined vacuum degree. It can also be filled with nitrogen or other mixed gases to complete the sealing process. Vacuum packaging machines are often used in the food industry because after vacuum packaging, the food can resist oxidation, thereby achieving the purpose of long-term preservation;

[0003] There are two commonly used vacuum packaging methods. One is to directly vacuum seal the sealed bag through vacuum equipment. This method is easy to form air cavities in the sealed bag, resulting in incomplete vacuum. The other is to use air pressure exchange to instantly squeeze the sealed bag with a relatively high pressure to quickly discharge the gas in the sealed bag. This method has a good vacuum effect, but when there is a hard object in the vacuum packaging bag, the instantaneous pressure is likely to cause the hard object to puncture the sealed bag.

[0004] The existing automatic flip-top vacuum packaging machine adopts the method of air pressure exchange for vacuum sealing. It is often used in the food processing industry to package perishable foods. Its working principle is to directly evacuate the sealed shell into a vacuum through a vacuum pump. At this time, due to the pressure difference, the pressure in the vacuum packaging bag is greater than the pressure in the sealed shell, causing expansion, and then the pressure inside the sealed shell is instantly released. The external air pressure instantly enters the sealed shell, and the vacuum packaging bag is compressed by the greater pressure of the atmospheric pressure, which instantly shrinks and discharges the gas in the vacuum packaging bag. The vacuum packaging bag forms a vacuum through the exchange of air pressure, and finally the vacuum packaging bag is sealed.

[0005] The existing automatic flip-top vacuum packaging machines often use a vacuum pump directly connected to the cover shell to directly evacuate the cover shell and then instantly release the pressure through the pressure relief valve. However, the pressure relief speed cannot be effectively controlled. When encountering meat containing bones or other products with hard objects, the compression rate of the sealed bag cannot be adjusted, which can easily lead to excessive air discharge rate in the sealed bag. When the sealed bag is squeezed and contracted quickly, bones or other hard objects can easily puncture the self-sealing bag, causing the self-sealing bag to leak when placed, so that external air is sucked into the sealed bag, the vacuum negative pressure environment is lost, and food is easily spoiled. Therefore, an automatic flip-top vacuum packaging machine that can prevent vacuum bags from being punctured and protect products is proposed to solve the above-mentioned problems. Summary of the invention

[0006] 1. Technical issues to be resolved

[0007] In view of the deficiencies in the prior art, the present invention provides an automatic flip-top vacuum packaging machine that can prevent vacuum bags from being punctured and protect products. The machine has the advantages of good sealing and anti-puncture sealed bags, etc., and solves the problem that the existing automatic flip-top vacuum packaging machines often use a vacuum pump directly connected to a cover shell to directly evacuate the cover shell and then instantly release the pressure through a pressure relief valve, but the pressure relief speed cannot be effectively controlled. When encountering meat containing bones or other products with hard objects, the compression rate of the sealed bag cannot be adjusted, which can easily lead to a too fast air discharge rate in the sealed bag. When the sealed bag is squeezed and contracted quickly, bones or other hard objects can easily puncture the self-sealing bag, causing the self-sealing bag to leak when it is placed, so that external air is sucked into the sealed bag, the vacuum negative pressure environment is lost, and the problem of food spoilage can be easily caused.

[0008] (II) Technical solution

[0009] The technical solution of the present invention to solve the above technical problems is as follows: an automatic flip-cover vacuum packaging machine capable of preventing vacuum bags from being punctured and protecting products, comprising a table body, the outer side of the table body being rotatably connected to a cover shell located above the table body, the front side of the cover shell and the front side of the table body being rotatably connected to the same air guide tube, the inner cavity bottom wall of the table body being fixedly connected to a pumping and inflating assembly, the inner cavity bottom wall of the table body being fixedly connected to a vacuum pump located on the right side of the pumping and inflating assembly, the input end of the vacuum pump being connected to the output end of the pumping and inflating assembly, and the input end of the pumping and inflating assembly being connected to the output end of the air guide tube;

[0010] The air pumping and charging assembly includes an intake shell and an exhaust shell, the intake shell is arranged horizontally, the exhaust shell is vertically fixedly connected to the top of the intake shell and is connected to the intake shell, the back of the exhaust shell is connected to a muffler, the left side and the back of the intake shell are fixedly connected to connecting pipes connected to the interior thereof, the interior of the intake shell is slidably connected to a first valve core adapted to an inner diameter thereof, the interior of the exhaust shell is slidably connected to a second valve core adapted to an inner diameter thereof, the right side of the first valve core and the top of the second valve core are fixedly connected to springs, the two springs are respectively fixedly connected to the left side wall of the inner cavity of the intake shell and the top wall of the inner cavity of the exhaust shell, the first valve core and the second valve core are fixedly connected to a rubber plug on the side away from the spring, the middle section of the first valve core is provided with an exhaust groove adapted to the rear connecting pipe, and the first valve core and the second valve core are both driven by solenoid valves.

[0011] The beneficial effect of the present invention is: by controlling the voltage and current through the solenoid valve to control the magnetic force of the solenoid valve, the magnetic force can be reduced when the cover shell is inflated, and cooperate with the spring to make the second valve core open and close from large to small during the inflation process, thereby controlling the air intake in the cover shell, thereby avoiding instantaneous inflation in the cover shell to squeeze the sealing bag and cause it to shrink rapidly, thereby avoiding the situation where hard objects puncture the sealing bag due to the instantaneous shrinkage of the sealing bag.

[0012] The automatic flip-cover vacuum packaging machine, which can prevent vacuum bags from being punctured and protect products, has the advantages of good sealing and anti-puncture sealed bags.

[0013] Based on the above technical solution, the present invention can also be improved as follows.

[0014] Furthermore, the outer side of the table body is fixedly connected to a panel surrounding the table body, the bottom of the table body is fixedly connected to four leveling feet, the bottom of the cover shell and the top of the table body are fixedly connected to matching sealing rubber rings, the top of the table body is fixedly connected to four sealing heating strips symmetrically arranged front to back, and the inner side of the cover shell is fixedly connected to a pressure strip matching the four sealing heating strips.

[0015] The beneficial effect of adopting the above further scheme is that the enclosure can improve the aesthetics of the equipment on the one hand, and can protect a number of electronic or mechanical equipment in the table body on the other hand, preventing foreign objects from entering the table body in the factory processing environment and affecting the operation of the internal electronic or mechanical equipment. The leveling feet can adjust the height of the four leveling feet when installing the equipment, so that the equipment can be placed horizontally.

[0016] Furthermore, the cover shell is arranged in a trapezoidal shape, and the length of the cover shell is equal to half the length of the table body. The front and rear sides of the cover shell are rotatably connected to two rocker arms that are symmetrically distributed front to back. The ends of the four rocker arms away from the cover shell are rotatably connected to the outer side of the table body. The air duct is located between the two rocker arms on the same side, and the outer sides of the two rocker arms on the same side are rotatably connected to the same handle.

[0017] The beneficial effect of adopting the above further scheme is that the handle can be used by the operator to apply pressure to the cover shell during use to improve the sealing of the cover shell, and the four rocker arms can drive the cover shell to cover left and right when shaking. At the same time, the left and right distance of the cover shell can be limited by the force arm of the rocker arm to improve the positioning performance.

[0018] Furthermore, the muffler is fixedly connected to the back of the exhaust shell, and the muffler includes a bull horn pipe, which is connected to the back of the exhaust shell, and the other two ends of the bull horn pipe are both sleeved with silencer covers on the outside.

[0019] The beneficial effect of adopting the above further scheme is that the silencer can reduce wind noise during air intake, and the bull-horn pipe has a three-way function, which can provide two air inlets to improve air intake efficiency.

[0020] Furthermore, the suction end of the vacuum pump is connected to a first pipe, the other end of the first pipe is connected to the connecting pipe on the left side of the air intake shell, the end of the air guide pipe away from the cover shell is connected to a second pipe located inside the table body, and the other end of the second pipe is connected to the connecting pipe on the back side of the air intake shell.

[0021] The beneficial effect of adopting the above further solution is that the pipeline connection can be replaced in time when the air tightness of the first pipeline or the second pipeline fails, and the disassembly and assembly are simple, which can reduce the production capacity attenuation caused by equipment shutdown.

[0022] Furthermore, the air duct is hollow, and both ends of the air duct are fixedly connected with sealing rubber rings respectively in contact with the cover shell and the table body, and the upper and lower ends of the air duct are rounded, and the air duct is U-shaped.

[0023] The beneficial effect of adopting the above further scheme is that the sealing rubber ring can improve the air tightness of the air duct while not affecting the swing of the air duct. The U-shaped setting of the air duct can enable the two ends of the air duct to be inserted into the cover shell and the table body respectively, thereby extending the length of the air intake or exhaust channel and reducing the pressure release of the air duct caused by the swing gap.

[0024] Furthermore, the outer sides of the two connecting pipes are provided with conical anti-slip grooves, and the first pipe and the second pipe are fixedly connected to the connecting pipes by using pipe clamps.

[0025] The beneficial effect of adopting the above further scheme is that the conical anti-slip groove can make the first pipe and the second pipe embed into the conical anti-slip groove when the pipe clamp applies pressure to the first pipe and the second pipe to fix them. On the one hand, it can improve the connection firmness of the first pipe and the second pipe with the connecting pipe. On the other hand, the embedding of the first pipe and the second pipe with the connecting pipe can also improve the fit between the first pipe and the second pipe and the connecting pipe and improve the air tightness.

[0026] Furthermore, piston rings are embedded in the outer sides of the first valve core and the second valve core, and the piston rings are used to improve the sealing between the first valve core and the second valve core and the inner walls of the intake shell and the exhaust shell. The rubber plug at the bottom of the second valve core is arranged in an arc shape. The first valve core is driven by the magnetic force of the solenoid valve to move left and right, and the second valve core is driven by the magnetic force of the solenoid valve to move up and down. When the left side of the first valve core contacts the left side wall of the inner cavity of the intake shell, the connecting pipe on the rear side is connected to the intake shell through the exhaust groove. The number of the solenoid valves is two, which are used to control the first valve core and the second valve core respectively.

[0027] The beneficial effect of adopting the above-mentioned further scheme is that the piston ring can improve the sealing between the first valve core and the second valve core and the inner wall of the intake shell and the exhaust shell, and reduce turbulence caused by gas leakage. The solenoid valve is a kind of actuator, which can provide or cut off the magnetic force by turning the power on and off. The first valve core and the second valve core are driven by the solenoid valve. When the intake shell and the exhaust shell are fixed, the movement of the first valve core and the second valve core inside can be controlled by magnetic force without drilling holes. The air tightness can be further improved without drilling holes in the intake shell and the exhaust shell, thereby improving the gas transmission efficiency.

[0028] Furthermore, the four sealing heating strips are electrically connected to the circuit inside the table body, and the four sealing heating strips generate heat through resistance, and are used to heat and seal the sealing bag in a vacuum state. The height of the four sealing heating strips does not exceed two centimeters. The interior of the table body is also provided with a pneumatic pump, and the four rocker arms are transmission-connected to the pneumatic pump, and the pneumatic pump is used to drive the four rocker arms to swing.

[0029] The beneficial effect of adopting the above-mentioned further scheme is that by controlling the swing of the four rocker arms through the pneumatic pump, it is possible to save effort and further reduce the workload of workers. At the same time, the purpose of controllable pressure of the cover shell can be achieved, reducing the uncertainty of airtightness caused by too little pressure applied manually. The sealing heating strip can heat, bond and seal the sealing bag without opening the cover shell after the air in the sealing bag is squeezed out to form a vacuum, thereby avoiding the situation where air enters the sealing bag due to the flat pressure environment after the cover shell is opened. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of the present invention;

[0031] Figure 2 It is a three-dimensional diagram of the structure of the present invention;

[0032] Figure 3 This is a front view of the connection structure between the cover shell and the rocker arm of the present invention;

[0033] Figure 4 It is a top view of the connection structure between the cover shell and the rocker arm of the present invention;

[0034] Figure 5 It is a front cross-sectional view of the connection structure between the first valve core and the air intake housing of the present invention;

[0035] Figure 6 This is a schematic diagram of the three-dimensional structure of the pumping and inflating assembly of the present invention;

[0036] Figure 7 It is a side view of the pumping and charging assembly structure of the present invention;

[0037] Figure 8 It is a top cross-sectional view of the connection structure between the first valve core and the air intake housing of the present invention;

[0038] Fig. 9 This is a rear view of the pumping and charging assembly structure of the present invention;

[0039] Fig.10 It is a front view of the pumping and charging assembly structure of the present invention.

[0040] In the figure: 1. table body; 2. cover shell; 3. air guide tube; 4. pumping and charging assembly; 401. air inlet shell; 402. exhaust shell; 403. connecting pipe; 404. first valve core; 405. second valve core; 406. spring; 407. rubber plug; 408. exhaust groove; 5. vacuum pump; 6. silencer; 601. ox-horn tube; 602. silencer cover; 7. enclosure; 8. leveling feet; 9. handle; 10. first pipeline; 11. second pipeline; 12. sealing heating strip; 13. rocker arm; 14. pneumatic pump. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] In the embodiment, Figure 1-10 Provided is an automatic flip-cover vacuum packaging machine that can prevent vacuum bags from being punctured and protect products. The present invention comprises a table body 1, the outer side of the table body 1 is rotatably connected to a cover shell 2 located above the table body 1, the front side of the cover shell 2 and the front side of the table body 1 are rotatably connected to the same air guide tube 3, the inner cavity bottom wall of the table body 1 is fixedly connected to a pumping and inflating assembly 4, the inner cavity bottom wall of the table body 1 is fixedly connected to a vacuum pump 5 located on the right side of the pumping and inflating assembly 4, the input end of the vacuum pump 5 is connected to the output end of the pumping and inflating assembly 4, and the input end of the pumping and inflating assembly 4 is connected to the output end of the air guide tube 3;

[0043] The pumping and charging assembly 4 includes an air intake shell 401 and an exhaust shell 402. The air intake shell 401 is arranged horizontally, and the exhaust shell 402 is vertically fixedly connected to the upper part of the air intake shell 401 and communicated with the air intake shell 401. The back of the exhaust shell 402 is connected with a muffler 6. The left side and the back of the air intake shell 401 are fixedly connected with a connecting pipe 403 communicating with the inside thereof. The inside of the air intake shell 401 is slidably connected with a first valve core 404 adapted to its inner diameter, and the inside of the exhaust shell 402 is slidably connected with a second valve core adapted to its inner diameter. 405, the right side of the first valve core 404 and the top of the second valve core 405 are both fixedly connected with springs 406, the two springs 406 are respectively fixedly connected to the left wall of the inner cavity of the air intake shell 401 and the top wall of the inner cavity of the exhaust shell 402, the first valve core 404 and the second valve core 405 are both fixedly connected with rubber plugs 407 on the side away from the springs 406, the middle section of the first valve core 404 is provided with an exhaust groove 408 adapted to the rear connecting pipe 403, and the first valve core 404 and the second valve core 405 are both driven by electromagnetic valves;

[0044] The outer side of the table body 1 is fixedly connected with a panel 7 surrounding the table body 1, the bottom of the table body 1 is fixedly connected with four leveling feet 8, the bottom of the cover shell 2 and the top of the table body 1 are fixedly connected with matching sealing rubber rings, the top of the table body 1 is fixedly connected with four sealing heating strips 12 symmetrically arranged front and back, and the inner side of the cover shell 2 is fixedly connected with pressure strips matching the four sealing heating strips 12;

[0045] The enclosure 7 can improve the appearance of the equipment on the one hand, and can protect the electronic or mechanical equipment in the table body 1 on the other hand, preventing foreign objects from entering the table body 1 in the factory processing environment and affecting the operation of the electronic or mechanical equipment inside. The leveling feet 8 can adjust the height of the four leveling feet 8 when installing the equipment, so that the equipment can be placed horizontally;

[0046] The cover shell 2 is arranged in a trapezoidal shape, and the length of the cover shell 2 is equal to half the length of the table body 1. The front and rear sides of the cover shell 2 are rotatably connected with two rocker arms 13 that are symmetrically distributed in the front and rear. The ends of the four rocker arms 13 away from the cover shell 2 are rotatably connected to the outer side of the table body 1. The air guide pipe 3 is located between the two rocker arms 13 on the same side, and the outer sides of the two rocker arms 13 on the same side are rotatably connected with the same handle 9.

[0047] The handle 9 can be used by the operator to apply pressure to the cover shell 2 to improve the sealing of the cover shell 2. The four rocker arms 13 can drive the cover shell 2 to cover left and right when shaking. At the same time, the force arm of the rocker arm 13 can limit the left and right distance of the cover shell 2 to improve the positioning performance.

[0048] The silencer 6 is fixedly connected to the back of the exhaust shell 402. The silencer 6 includes a bull horn pipe 601, which is connected to the back of the exhaust shell 402. The other two ends of the bull horn pipe 601 are both sleeved with silencer covers 602.

[0049] The silencer cover 602 can reduce wind noise when air is inhaled, and the horn pipe 601 has a three-way function, which can provide two air inlets to improve air intake efficiency;

[0050] The suction end of the vacuum pump 5 is connected to a first pipe 10, the other end of the first pipe 10 is connected to a connecting pipe 403 on the left side of the air inlet shell 401, and the end of the air guide pipe 3 away from the cover shell 2 is connected to a second pipe 11 located on the inner side of the table body 1, and the other end of the second pipe 11 is connected to the connecting pipe 403 on the back side of the air inlet shell 401;

[0051] The use of pipeline connection allows timely replacement of the first pipeline 10 or the second pipeline 11 when the air tightness fails, and is simple to disassemble and assemble, thereby reducing the capacity attenuation caused by equipment downtime;

[0052] The air duct 3 is hollow, and both ends of the air duct 3 are fixedly connected with sealing rubber rings that are in contact with the cover shell 2 and the table body 1 respectively. The upper and lower ends of the air duct 3 are rounded, and the air duct 3 is U-shaped.

[0053] The sealing rubber ring can improve the air tightness of the air duct 3, and at the same time can not affect the swing of the air duct 3. The U-shaped setting of the air duct 3 can make the two ends of the air duct 3 inserted into the cover shell 2 and the table body 1 respectively, extend the length of the air intake or exhaust channel, and reduce the pressure release caused by the swing gap of the air duct 3;

[0054] The outer sides of the two connecting pipes 403 are both provided with conical anti-slip grooves, and the first pipe 10 and the second pipe 11 are both fixedly connected to the connecting pipes 403 by pipe clamps;

[0055] The conical anti-slip groove can make the first pipe 10 and the second pipe 11 embedded in the conical anti-slip groove when the pipe hoop applies pressure to fix the first pipe 10 and the second pipe 11. On the one hand, it can improve the connection firmness of the first pipe 10 and the second pipe 11 and the connecting pipe 403. On the other hand, the embedding of the first pipe 10 and the second pipe 11 into the connecting pipe 403 can also improve the fit between the first pipe 10 and the second pipe 11 and the connecting pipe 403 and improve the air tightness.

[0056] The outer sides of the first valve core 404 and the second valve core 405 are both embedded with piston rings, which are used to improve the sealing between the first valve core 404 and the second valve core 405 and the inner walls of the air intake shell 401 and the exhaust shell 402. The rubber plug 407 at the bottom of the second valve core 405 is arranged in an arc shape. The first valve core 404 is driven by the magnetic force of the solenoid valve to move left and right, and the second valve core 405 is driven by the magnetic force of the solenoid valve to move up and down. When the left side of the first valve core 404 contacts the left side wall of the inner cavity of the air intake shell 401, the rear connecting pipe 403 is connected with the air intake shell 401 through the exhaust groove 408. There are two solenoid valves, which are used to control the first valve core 404 and the second valve core 405 respectively;

[0057] The piston ring can ensure the sealing between the first valve core 404 and the second valve core 405 and the inner wall of the intake shell 401 and the exhaust shell 402, and reduce the turbulence caused by gas leakage. The solenoid valve is a kind of actuator, which can provide or cut off the magnetic force by turning the power on and off. The first valve core 404 and the second valve core 405 are driven by the solenoid valve. When the intake shell 401 and the exhaust shell 402 are fixed, the first valve core 404 and the second valve core 405 can be controlled to move by magnetic force without drilling holes. The air tightness of the intake shell 401 and the exhaust shell 402 can be further improved without drilling holes, thereby improving the gas transmission efficiency.

[0058] The four sealing heating strips 12 are all electrically connected to the circuit in the table body 1. The four sealing heating strips 12 generate heat through resistance and are used to heat and seal the sealed bag in a vacuum state. The height of the four sealing heating strips 12 is no more than two centimeters. The inside of the table body 1 is also provided with a pneumatic pump 14. The four rocker arms 13 are all transmission-connected to the pneumatic pump 14. The pneumatic pump 14 is used to drive the four rocker arms 13 to swing.

[0059] By controlling the four rocker arms 13 to swing through the pneumatic pump 14, labor-saving effect can be achieved, and the workload of workers can be further reduced. At the same time, the purpose of controllable pressure of the cover shell 2 can be achieved, and the uncertainty of air tightness caused by too little pressure applied manually can be reduced. The sealing heating strip 12 can heat, bond and seal the sealing bag without opening the cover shell 2 after the air in the sealing bag is squeezed out to form a vacuum, thereby avoiding the situation where air enters the sealing bag due to the flat pressure environment after the cover shell 2 is opened.

[0060] Working principle:

[0061] The first step: pre-pack the meat food in a sealed bag without sealing it, and then put the open end of the sealed bag on the sealed heating strip 12, start the pneumatic pump 14, and the pneumatic pump 14 drives the rocker arm 13 to move the cover shell 2, so that the cover shell 2 is buckled on the sealed bag, and the cover shell 2 cooperates with the sealed heating strip 12 to clamp the open end of the sealed bag. At this time, start the vacuum pump 5 and the solenoid valve. The solenoid valve and the vacuum pump 5 drive the first valve core 404 to squeeze the spring 406 to contract and open the air intake shell 401 of the pumping and charging assembly 4, so that the first pipeline 10, the air intake shell 401, the second pipeline 11, the vacuum pump 5, the air guide pipe 3 and the cover shell 2 are connected, and the vacuum pump 5 is used to evacuate air, and the air in the cover shell 2 is extracted through the first pipeline 10, the air intake shell 401, the second pipeline 11 and the air guide pipe 3 in turn, forming a negative pressure, and the sealed bag is expanded by the negative pressure in the cover shell 2;

[0062] Step 2: Move the first valve core 404 to the left through the electromagnetic valve to seal the air intake shell 401, and then attract the second valve core 405 to move upward and open the exhaust shell 402 through the electromagnetic valve. At this time, the air intake shell 401 and the exhaust shell 402 are connected through the exhaust groove 408 on the outside of the first valve core 404. Due to the suction force generated by the negative pressure in the cover shell 2, the outside air is absorbed through the air guide pipe 3, the second pipeline 11, the air intake shell 401, the exhaust shell 402 and the muffler 6 in sequence to supplement the atmospheric pressure in the cover shell 2. The sealed bag is squeezed and contracted by the supplemented atmospheric pressure. During the contraction process, the power of the electromagnetic valve is weakened to reduce the magnetism. At the same time, the second valve core 405 is pushed by the spring 406 to keep moving downward slowly, gradually reducing the entry of outside air, so that the sealed bag can be squeezed more gently to avoid the puncture of the sealed bag caused by instantaneous contraction.

[0063] Step 3: After the sealing is completed, start the sealing heating strip 12 for heating, and the sealing bag is melted by the cooperation between the cover shell 2 and the sealing heating strip 12 and the heat of the sealing heating strip 12, so that the sealing bag is sealed. At the same time, repeat the first step to prepare another part of food that needs to be sealed. After the heating and sealing are completed, the pneumatic pump 14 can be started again to snap on the other side of the table body 1 for continuous sealing.

[0064] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0065] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic flip-cover vacuum packaging machine capable of preventing vacuum bags from being punctured and protecting products, comprising a table body (1), characterized in that: The outer side of the table body (1) is rotatably connected to a cover shell (2) located above the table body (1); the front side of the cover shell (2) and the front side of the table body (1) are rotatably connected to the same air guide tube (3); the bottom wall of the inner cavity of the table body (1) is fixedly connected to an air pumping and inflating assembly (4); the bottom wall of the inner cavity of the table body (1) is fixedly connected to a vacuum pump (5) located on the right side of the air pumping and inflating assembly (4); the input end of the vacuum pump (5) is connected to the output end of the air pumping and inflating assembly (4); and the input end of the air pumping and inflating assembly (4) is connected to the output end of the air guide tube (3); The pumping and charging assembly (4) comprises an air intake shell (401) and an air exhaust shell (402), wherein the air intake shell (401) is arranged horizontally, and the air exhaust shell (402) is vertically fixedly connected to the upper part of the air intake shell (401) and communicated with the air intake shell (401), and the back side of the air exhaust shell (402) is communicated with a muffler (6), and the left side and the back side of the air intake shell (401) are fixedly connected with a connecting pipe (403) communicated with the inside thereof, and the inside of the air intake shell (401) is slidably connected with a first valve core (404) adapted to the inner diameter thereof, and the inside of the air exhaust shell (402) is slidably connected with a second valve core (404) adapted to the inner diameter thereof. (405), the right side of the first valve core (404) and the top of the second valve core (405) are fixedly connected with a spring (406), the two springs (406) are respectively fixedly connected to the left wall of the inner cavity of the intake shell (401) and the top wall of the inner cavity of the exhaust shell (402), the first valve core (404) and the second valve core (405) are fixedly connected with a rubber plug (407) on the side away from the spring (406), the middle section of the first valve core (404) is provided with an exhaust groove (408) adapted to the rear connecting pipe (403), and the first valve core (404) and the second valve core (405) are both driven by electromagnetic valves.

2. The automatic flip cover vacuum packaging machine capable of preventing vacuum bag puncture and protecting products according to claim 1, characterized in that: The outer side of the table body (1) is fixedly connected to a panel (7) surrounding the table body (1), the bottom of the table body (1) is fixedly connected to four leveling feet (8), the bottom of the cover shell (2) and the top of the table body (1) are fixedly connected to matching sealing rubber rings, the top of the table body (1) is fixedly connected to four sealing heating strips (12) symmetrically arranged front and back, and the inner side of the cover shell (2) is fixedly connected to pressure strips matching the four sealing heating strips (12).

3. The automatic flip cover vacuum packaging machine capable of preventing vacuum bag puncture and protecting products according to claim 2, characterized in that: The cover shell (2) is arranged in a trapezoidal shape, and the length of the cover shell (2) is equal to half the length of the table body (1). The front and rear sides of the cover shell (2) are both rotatably connected to two rocker arms (13) that are symmetrically distributed in the front and rear directions. The ends of the four rocker arms (13) away from the cover shell (2) are all rotatably connected to the outer side of the table body (1). The air guide pipe (3) is located between the two rocker arms (13) on the same side, and the outer sides of the two rocker arms (13) on the same side are rotatably connected to the same handle (9).

4. The automatic flip cover vacuum packaging machine capable of preventing vacuum bag puncture and protecting products according to claim 1, characterized in that: The silencer (6) is fixedly connected to the back side of the exhaust shell (402), and the silencer (6) comprises a bullhorn tube (601), the bullhorn tube (601) is connected to the back side of the exhaust shell (402), and silencer covers (602) are sleeved on the outer sides of the other two ends of the bullhorn tube (601).

5. The automatic flip cover vacuum packaging machine capable of preventing vacuum bag puncture and protecting products according to claim 1, characterized in that: The suction end of the vacuum pump (5) is connected to a first pipe (10), the other end of the first pipe (10) is connected to a connecting pipe (403) on the left side of the air inlet shell (401), and the end of the air guide pipe (3) away from the cover shell (2) is connected to a second pipe (11) located on the inner side of the table body (1), and the other end of the second pipe (11) is connected to a connecting pipe (403) on the back side of the air inlet shell (401).

6. The automatic flip cover vacuum packaging machine capable of preventing vacuum bag puncture and protecting products according to claim 1, characterized in that: The air guide tube (3) is hollow, and both ends of the air guide tube (3) are fixedly connected with sealing rubber rings that are in contact with the cover shell (2) and the table body (1) respectively. The upper and lower ends of the air guide tube (3) are rounded, and the air guide tube (3) is U-shaped.

7. The automatic cover-turning vacuum packaging machine capable of preventing vacuum bags from being punctured and protecting products according to claim 5, characterized in that: Conical anti-slip grooves are provided on the outer sides of the two connecting pipes (403), and the first pipe (10) and the second pipe (11) are fixedly connected to the connecting pipes (403) by using pipe clamps.

8. The automatic cover-turning vacuum packaging machine capable of preventing vacuum bags from being punctured and protecting products according to claim 1, characterized in that: The outer sides of the first valve core (404) and the second valve core (405) are both embedded with piston rings, and the piston rings are used to improve the sealing between the first valve core (404) and the second valve core (405) and the inner walls of the intake shell (401) and the exhaust shell (402). The rubber plug (407) at the bottom of the second valve core (405) is arranged in an arc shape. The first valve core (404) is driven by the magnetic force of the electromagnetic valve to move left and right, and the second valve core (405) is driven by the magnetic force of the electromagnetic valve to move up and down. When the left side of the first valve core (404) contacts the left side wall of the inner cavity of the intake shell (401), the rear connecting pipe (403) is connected to the intake shell (401) through the exhaust groove (408).

9. The automatic cover-turning vacuum packaging machine capable of preventing vacuum bags from being punctured and protecting products according to claim 3, characterized in that: The four sealing heating strips (12) are all electrically connected to the circuit inside the table body (1). The four sealing heating strips (12) generate heat through resistance and are used to heat and seal the sealed bag in a vacuum state. The height of the four sealing heating strips (12) does not exceed two centimeters. The interior of the table body (1) is also provided with a pneumatic pump (14). The four rocker arms (13) are all transmission-connected to the pneumatic pump (14). The pneumatic pump (14) is used to drive the four rocker arms (13) to swing.

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